Dust-collector for middlings-purifiers



(No Modem 2 sheets-smeet 41.l

W. S. RUSSELL.

DUST COLLECTOR EUR MIDDLINGS PURIPIERS, 65o.

Patented Jan. 10,1882.

No. 252,144. mgl

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(No Model.) 2 sheets-sheet 2.

W. S. RUSSELL.

DUST COLLECTOR POR MIDDLINGS PURIFIE-RS, & l 1 No.252,144. PatentedJan.10,1882.

N. PETERS, PhmLimognpner. wmingwn. n. c.

lhvITnnY STATES PATENT' OFFICE.

WILLIAM SJ-RUSSELL, OF NORTHFIELD, MINNESOTA.

SPECIFICATION forming part of Letters Patent No. 252,144, dated January10, 1852,

Application tiled August 5, 1881. (No model.) i

To all whom it may concern Be it known that I, VWILLIAM SYLvEsrERRUSSELL, a citizen ofthe United States, resid ing at Northfield,` countyof Rice, and State of Minnesota, have invented a new and usefulDust-Collector for lliidd-lingsPurifiers,Snc., of

l which the following is a specification.

My invention relates to certain improvements in machinery for collectingthe dust from middlings-puriers, millstones, and other machinery` whichproduce dust in their operation; and it consists in the method and meanshereinafter described, and specifically set forth in the claims.

Referring to the drawings, Figure lis a vertical section of a machineembodying my invention. Fig 2 is a plan of `a. dischargegate. Fig. 3 isaplan, and in part a horizontal section,of the machine; and Figs. et, 5,6, and 7 are details hereinafter described. c

' A A represent aisimple rectangular framework supported upon andextending centrally over a base-board, B, and serving to supportvcertain portions of the mechanism employed.

The base B may,if desired, be supported independently of or inconjunction with the machines with which my machine is intendedV to beused, and any suitable frame-work may he used.

In addition to the frame A, and co-operating therewith, there are thefollowing principal elements of my machine: an induction-pipe,f, ahopper, g, an eduction-pipe or discharge-passage, i, intervening gates jj', a balloon or-reel, L, and knocking or jarring mechanism T, andisolating or cut-oh" mechanism R r, all of which l will now proceed tomore particularly describe.

The induction-pipe f communicates directly r indirectly with themillstone or plant of milling machinery, or other machine of thecharacter hereinbefore mentioned, and conducts or directs `the dust,impurities, light pari ticles of grain, andsimilar substances intothehopper g, while they are intermingled with and carried by the blast ofair `by which they are moved from said machines, as is usual.

The hopper g extends upwardly to the base B, where it teru'linatesA at arib, b', which forms a substantially air-tight joint with the lower fingH, which consists of a hub and spokes, .which 'support the reel L, bywhich means it ,is rotated. ,c `The reel consists of a lower head, h,and an .upperheath h', connected by rods p p and q q, parallel to eachother and slanted from base positel'y disposed, so' that they do notdirectly communicate orregister witheach other. 6o`

Upon and Within the case are the gatesjj,

which consist of hubs having curvedvanes n a', the hubs being fitted toa shaft, c, which passes through the case, as shown. The shaft c restsand revolves u Jou a ste c and is ro- 6 tated slowly by means of gear dmeshing with aworm, e, mounted on shaft X,which is driven,

ft'rom any convenientsource of powerby a belt-` pulley, W. The shaft cis secured to the castto top, and about which reticulated cloth orrother suitable screening material is so arranged l* as to constitutepockets or apartments, in this instance V-shaped in cross-section andextending from one head ofthe reel to the other. (See Fig.,3.) The upperhead of the reel is solid ,and imperforate, constituting, in connectionwith the screen-apartments, a practically airtight as well as dust-proofupper end to the reel. The lower head is open at its center, and 85, hasan inner outline coinciding with the screen, l being extended inwardlyin points for the support of therods q of the screen-apartments.

Withinf'the reel is supported, by the frame A, a central non-rotativerod, b, to whichare adjustably attached laterally-adjustable arms E,which support in any suitable 'manner aV cushion or guard, It, extendingfrom the top to the bottom of the reel and having a curved face,coincident with the circle described by the rods q. c f

Beneath the head h, and at the Vtop ot' the hopper g, is a small cushionor guard, r, supported at .its outer end by straps of iron secured toits under surface by screws or other- :oo

, being shown at s. The hoop S closes the space between the inner end ofthe small cushion r and the lower end of the large cushion 1t, thusconstituting a separate V-shaped apartment, the top being reel-head h,the inner side heilig guard or cushion R,the outer converging sidesbeing the screen about the posts q q p, andthe bottom being the lowerhead, h, the small cushion r, (at that portion between the rods q qwhere the head 7L is formed in points,) and the strap S.

The head h is provided with pins w, against which the arm i: on theknocker-shaft T strikes during the rotation of the head. Shaft T isprovided with the knockers t t and a'retracti ngspring,, and issupported in suitable bearings in the frame-work A. The arm V andtheknookers t t are adjustably attached to the shaftT bymeans ofset-screwst',and the spring .r iscoiled about the shaft andfastened at one end tothe bearing-bracket y and at the other end to a collar, a, provided witha set-screw, whereby the tension of the spring may be adjusted so as tocause the knockers to act with greater or less force.

The operation of the machine is as follows: The blast of air bearing thedust enters the hopper g by the induction-pipef, and there e'X- pandsand rises into the reel through its central opening, and between thearms ofthe casting H, and between the inwardly-extending points ofthehead. During this time the heavier particlesfall by gravity to thebottom of the hopper, while the lighter substancesare carried by the airagainst the screenapart ments, and from the inner surface thereof solneportions of the dust may fall into the hopper by gravity when it hascollected upon the screen' in quantity sufficient to overcome thepressure ofthe air which passes through the screen, leaving its burdenof dust deposited thereon. As the screen moves in its slow rotation tliesuccessive apartments are brought over the cushion r and outside of andadjacent to the large cushion R, and these cushions or guards and thestrapS cut oi or separatesuch apartments from the pressure and influenceof` the. air, rendering them what might be termed dead-air chambers orapartments,a nd while l so protected and isolated the knockerst t strikel.

against one (the outer in this instance) ofthe .posts of said isolated'apartments and byconcussion remove the accumulated dust from the innersurfaces of said isolated screen-apart.l ments, each after the lother inregular succesl sion, as they are successively brought within ing gate jrotates 'and sweeps the dust over the aperture m, when it fallswithinthe gatecase K, where the gate j sweeps it around therein and over theopposite aperture, m', where it falls into the discharge-passage i, andis conducted to desired points for further operation, as usual. Duringthis operation ot' discharging the contents of the hopper it will beobserved that the air or blast has been retained within the hopper byreason of the construction, arrangement, and operation of the gates j j.The curved arms u of the gate j constitute, in connection with the innersides lof the case K, air tight, separated, and isolated pockets orcarriers, which, after they have moved a quarter-revolution, arecompletely bevond any influence of the blast and inaccessible thereto,and so continue until they discharge their contents into the passage t'.V

.The guards or cushions may, if desired, be extended in area so as toisolate more than a single section, and other apparent modiiicationsmaybe availed without departure from my invention.

It is evident that by tightening the coil ofv spring by turning thecollar z upon the `Shaft T, the set-screw being used to retain the col;lar in a desired position, the force of the blow ot" the knockers maybeincreased or diminished, as desired.

v Having described my invention and its operation, what I claim,anddesire to secure by Letters Patent, is-

1. The combination of mechanism'for conductinga blast against andthrough a screen, mechanism for rotating said screen, mecham/ ism rforisolatinga portion of said screen, mechanism for jarring said isolatedportion, and mechanism for isolating the substances'thus separated lfromthe blast and conducting them away from the influence of said blast, allsubstantially as shown and described.

IOO

IOS

2. The combination of an induction-pipe, a

hopper, and a gate-case havin-g an upper vre- `ceivin g port or apertureand' a lower oppositely-disposed discharging port or aperture, and aninclosed rotating gate adapted to register alternately with said portsor apertures, all substantially as shown and described.

'3. The combinat-ion ot' an induction-pipe, a4 hopper, a gate forclosing the outlet'of the hopper, a rotating reel having an upper closed'head and a lower open headfand sides arranged vin compartments, andcushions orguards which isolate successive compartments with mechanismfor jarring such isolated compartments, all substantially as shown anddescribed.

4. The combination of a rotating reel or screen formed in compartments,a stationary inner guard or cushion Vand a stationary lower A gua-rd orcushion, and a strap attached to thev reel-head, substantially as shownand de@ scribed. v

5. The combination of the shaft T,adjusta 'ble arm r, adjustableknock'ers tia-andadjustr3 IIQ,

252.144V I a 6. The combination of frame A, non-rotattive shaft b,adjustable arms E, and cushion or, guard R with the reel L and rotativeshaft c, substantially as shown and described.

5 7. The combination of the reel L, kuockers t, and guards R r withmeans, substantially as shown and described, for their operation,substantially as and for the purpose set forth.

8. The combination of the reel or screen L,

ro hopper g, connected therewith, the shaft c,

and the gate-case K and gates j j', substan- `tiallly as showu anddescribed.

9. `The combination of the reel or screen L, provided with pins u', androtated about the fixed bar b, supported iu frame A, with said I5 frameand the kuocker-shaft T, supported in said frame and provided with thearm fv, substantially tts shown and described. l

WILLIAM SYLVESTER RUSSELL.

Witnesses:

R. Vo'N ToBEL, Jr., J. F. HUNTER.

